Improvement in steam-boilers



CHARLES M. MILES, OF VINELAND, NEW JERSEY, ASSIGNOR. TO HIMSELF PATENTOFFICE.

AND OHARLESF. JONES, OF SAME PLAGE.

IMPROVEMENT IN STEAM-BOILERS.

Specification forming part of Letters Patent No. 113,624, dated July 19,1864.

To all whom, it Mayta/zown,.-

Be it known that l, CHARLES M. MILES, of Vineland, in the county' ofCumberland and State of New Jersey, have invented a new and usefulImprovementin Steam-Boilers; and I do hereby declare that thefollowingisafull, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming part of thisspecitication, in Which- Figure l is a central vertical longitudinalsection of a boiler constructed according to my invention. Fig. 2 is atransverse section of the same in the plane indicated by the line x a:in Fig. l. Fig. 3 is a transverse vertical section ofthe same in theplanes indicated by the line y y in Fig. l.

Similar letters of reference indicate corre.- sponding parts in theseveral figures.

This invention consists in a novel arrangement ot' Water tubes, smoke orgas tubes, and smoke-box, in combination with thetire-box of ahorizontalboiler, whereby I obtain a large heatingsnrface and utilize'in a veryhigh degrec the heat ot' the escaping gaseous products ot' combustionbefore permitting them to escape to the chimney.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A B is the shell of the boiler, constructed of a form substantially likethat oi' a locomotiveboiler.

O is the tire-box, having water-spacca ab e at its sides, i'ront, andback, as in a locomotive-boiler.

D D are water tubes running through the lower part ot' the iirebox at ashort distance above the grate E, and connecting` the Waterspace b iniront of the lire-box with that c in rear of it.

F F are vvatertubes running through the upper part ot` the tire box, andconncctingthe Irontwater space, b, With the main Water-space the mainWater-space in the shell B to a smokeboX, H, arranged Within the Iearportion of the shell B. This smoke-box instead of being entirely in rearof the Water-space, as in an ordinary locomotive-boiler, has aWaterspace, d, in rear of it, and a Water-space, e, above it. l I I arereturn smoke or gas tubes running from the upper part of the front ofthe smokebox H horizontally through the main Waterspaee, through thelarger water-tubes F F, in the upper part of the tire-box, and throughthe front plate, f, of the boiler, and communieating with the interiorof a breeching, J, which is secured to the front of the boiler. Thisbreeching may have the chimney on the top of it, but is represented inFig. 1 as communicating with a flue, K, which covers the upper part ofthe shell, and communicates with a chimney, L, over the rear'part of theshell. The boiler is lilled with water to some distance above thelire-box and smoke-box, and the upper part ot' the shell A B is left forsteam-space. When lire is made in the tirebox, the smoke and heatedgaseous products ot' combustion all pass from the tire-box through thetubes Gr G to the smoke-box H, whence they return through the tubes I lto the breeching J, and thence either directly or through the flue K tothe chimney, as indicated by arrows in Fig. l. The whole of thetire-box, the tubes D, F, G, and I, and thesmokebox H all presentheating-surfaces, which, combined, have a very extensive area. TheWater-tubes D and F are exposed not only tothe flame. and heated gaseousproducts ot' combustion, but to in a great measure the direct radiationfrom the fire on the grate, and hence a very rapid generation of steamtakes place within them. The gaseous products of combustion on theirarrival at the breeching have so much of their heat extracted that theyare of little further use, unless it be to keep hot the steam-space inthe upper part of the shell, and hence the boiler must be verycconomical of fuel.

What I claim as my invention, and desire to secure by Letters Patent,is-

The combination, in a horizontal boiler, ot the fire-box (l, gas andsmoke tubes Gr G, smoke-box H, return--tubes I, and watertubes D and F,the Whole arranged substantially as herein specified.

CHARLES M. MILES/y Witnesses:

UHAs. F. J oNEs, SALLIE J oNEs.

